Click on map to open large map in new window (Map updated: 11 August 2009)

Click here to view an interactive map of the Northern Ireland dataset as currently collated by CEDaR.The map is generated through the NBN Gateway using their Interactive Mapping Tool.

This is a species of intertidal rocks and stones, especially along sheltered shores and estuaries. Generally, the thin brown to blackish thallus lacks the cracked surface of similar species but has instead a fine stippling of small dark dots and ridges. The small (to 0.2mm diam.) spherical discs (perithecia) form shiny conical projections which sit almost on the surface like black beads. Throughout Ireland in suitable habitats.

Key characteristics

Largely an intertidal zone lichen of rocks and stones; thallus brown with microscopic dots and ridges

The black discs are evenly distributed and sit like beads on the surface.